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Finding the Fourth Proportional to 87,287.94, 120,461.31 and 51,479.46

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Solution

The fourth proportional to 87,287.94, 120,461.31 and 51,479.46 is: 71,043.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,287.94 : 120,461.31 = 51,479.46 : x
  2. Step 2: Convert to fraction form
    87,287.94/120,461.31 = 51,479.46/x
  3. Step 3: Cross multiply
    87,287.94x = 120,461.31 × 51,479.46
  4. Step 4: Simplify right side
    87,287.94x = 6,201,283,189.69
  5. Step 5: Solve for x
    x = 6,201,283,189.69/87,287.94
  6. Step 6: Final answer
    x = 71,043.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.